Yes, you can use this http://www.jpct.net/jpct-ae/doc/com/threed/jpct/Texture.html#setClamping(boolean). To repeat properly, your model has to be build in a way so this makes sense, of course (i.e. using uv-coodinates <0 or >1 for some polygons). This setting (as well as the GL settings you've mentioned) don't make textures magically repeat whose uv-coordinates are just between 0 and 1. However, you can't specify the number of repeats because that's defined by the way in which the model has been build. It's NOT a texture related attribute.